This bracelet dates from the 1940's to 50's and features six heavy sterling links that alternate with warrior masks and Aztec calendars.  All of the figures are nicely set on silver curliques that are set on open silver panels.  The warriors are obsidian stones that have been bezel set.  The calendars are very detailed and there is a scratch or crack on one calendar that, although visible, does not threaten the integrity of the bracelet  It has a lovely patina and is marked on the back with the words"Hecho en Mexico 925" and the initials "JE" in the center.  The safety chain has had the clasp  and chain replaced.  There is a nice older fold-over clasp.  The bracelet measures 6 3/8" in diameter, each panel measuring 1" long by 1 1/8" wide.

 

 View of the maker's mark: